YOKOSUKA NAVAL BASE, Japan — Commander, U.S. Naval Forces Japan personnel management officer Robert Nolan still is being detained by Japanese police and could be held for another 10 days as they continue to investigate last week’s death of a Japanese man, a spokesman for the Yokosuka branch of Yokohama District Public Prosecutor’s Office said Monday.

“Today [Monday] was the day when the initial 10-day pre-indictment detention period expired, and a request from the prosecution to extend the period for another 10 days was approved,” the spokesman said. No charges had been filed against the 54-year-old Nolan as of Monday.

Katsumi Nakagawa, 70, died from head injuries in Yokosuka on Nov. 6, four days after a Nov. 2 incident outside Live Bar Buzz, a few blocks from Yokosuka Naval Base.